From 40d17c1305676d2b720903458e190b93d6dccbe6 Mon Sep 17 00:00:00 2001
From: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Date: Thu, 8 Aug 2019 03:49:59 +0200
Subject: [PATCH] wlr_seat_touch: add a way for a grab to ignore a touch point

---
 types/seat/wlr_seat_touch.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/types/seat/wlr_seat_touch.c b/types/seat/wlr_seat_touch.c
index 58db92cf..dd57b55a 100644
--- a/types/seat/wlr_seat_touch.c
+++ b/types/seat/wlr_seat_touch.c
@@ -175,6 +175,11 @@ uint32_t wlr_seat_touch_notify_down(struct wlr_seat *seat,
 
 	uint32_t serial = grab->interface->down(grab, time, point);
 
+	if (!serial) {
+		touch_point_destroy(point);
+		return 0;
+	}
+
 	if (serial && wlr_seat_touch_num_points(seat) == 1) {
 		seat->touch_state.grab_serial = serial;
 		seat->touch_state.grab_id = touch_id;